/*
 * Copyright 2019-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.js.data.system.security.service;

import cn.hutool.core.util.RandomUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.js.data.common.utils.RedisUtils;
import com.js.data.system.dto.JwtUserDTO;
import com.js.data.system.security.bean.LoginProperties;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

/**
 * 用于清理 用户登录信息缓存，为防止Spring循环依赖与安全考虑 ，单独构成工具类
 */
@Component
public class UserCacheManager {

    @Resource
    private RedisUtils redisUtils;

    @Value("${login.user-cache.idle-time}")
    private long idleTime;

    /**
     * 返回用户缓存
     *
     * @param userName 用户名
     * @return JwtUserDto
     */
    public JwtUserDTO getUserCache(String userName) {
        if (StringUtils.isNotEmpty(userName)) {
            // 获取数据
            Object obj = redisUtils.hget(LoginProperties.cacheKey, userName);
            if (obj != null) {
                return JSON.parseObject(String.valueOf(obj), JwtUserDTO.class);
            }
        }
        return null;
    }

    /**
     * 添加缓存到Redis
     *
     * @param userName 用户名
     */
    @Async
    public void addUserCache(String userName, JwtUserDTO user) {
        if (StringUtils.isNotEmpty(userName)) {
            // 添加数据, 避免数据同时过期
            long time = idleTime + RandomUtil.randomInt(900, 1800);
            redisUtils.hset(LoginProperties.cacheKey, userName,  JSON.toJSONString(user, SerializerFeature.DisableCircularReferenceDetect), time);
        }
    }

    /**
     * 清理用户缓存信息
     * 用户信息变更时
     *
     * @param userName 用户名
     */
    @Async
    public void cleanUserCache(String userName) {
        if (StringUtils.isNotEmpty(userName)) {
            // 清除数据
            redisUtils.hdel(LoginProperties.cacheKey, userName);
        }
    }
}
